Published February 05, 2009
Could plug-in hybrid cars actually increase greenhouse gas emissions? Is energy efficiency being oversold as a greenhouse gas reduction measure? A new report from the research arm of Congress raises troubling questions about the direction in which President Obama is taking us.
Produced by the Congressional Research Service (CRS), Carbon Control in the U.S. Electricity Sector: Key Implementation Uncertainties provides the lowdown on a variety of carbon control options for the electric power sector, including energy efficiency, renewable energy, nuclear power, advanced coal technology, carbon capture and sequestration, plug-in hybrid vehicles and small-scale power generation technologies.
President Obama has proposed that we reduce our CO2 emissions to 1990 levels by 2020. For the electric power sector, this goal translates to reducing what is projected to be 2.6 billion metric tons of CO2 emitted in 2020 to approximately the 1.8 billion metric tons of CO2 that were emitted in 1990 -- a more than 30 percent reduction in emissions over a period of about 10 years.
Could this goal be achieved through gains in energy efficiency? Numerous private and government sources have claimed, after all, that 25- to 30-percent gains in efficiency are possible over a 5- to 15-year time horizon. But according to the CRS, “the diffuse nature of efficiency opportunity and the economic complexity of decision making” has historically made moving beyond the 5 percent to 7 percent electricity savings range “a persistent challenge to conservation proponents.” Although more aggressive policies could be attempted, the CRS says, there is “little track record upon which to base projections of future effectiveness.”
The CRS considered wind power and biomass as renewable energy sources. The main problem with wind, according to the report, is that while proponents assert wind could provide 20 percent of U.S. electricity needs, the U.S. electricity transmission network is already much constrained, with wind power producing only 1 percent of those needs. As much as 19,000 miles of new transmission lines would be needed to make wind work. The price tag -- a net present value of $26 billion -- isn’t the showstopper so much as public challenges to transmission line projects, which the CRS describes as “among the most serious and intractable challenges in the U.S. energy sector.”
The prospects for biofuels are worse. The CRS report cites sources that say a significant increase in biofuel production “would require harvesting various energy crops at a scale that vastly exceeds current practice.” A 2007 study from MIT estimated that as much as 500 million acres of land would be required, which would displace so much cropland that the U.S. would have to become a “substantial agricultural importer.”
Heavy use of biofuels, it seems, would simply move us from depending on foreign oil to depending on foreign food.
Nuclear power? Given the facts of green opposition to nuclear power and the decline in U.S. nuclear infrastructure over the last 30 years, the optimistic view for nuclear power is that we could perhaps build as many as 30 new U.S. reactors by 2030 -- fewer than half the number constructed during the 1963-1985 heyday of nuclear construction. The pessimistic view, as cited by the CRS, is that we aren’t likely to see a serious ramp up of nuclear power for 15 to 20 years.
Although advanced coal technology can reduce CO2 emissions, the plants “still burn coal and -- absent carbon capture technology -- still release large volumes of CO2 to the atmosphere,” observes the CRS. So what about carbon capture and sequestration (CCS)? Should we hold our breath waiting for it? Not according to the CRS. Hardly anyone expects the first CCS projects to be constructed before 2020. Then again, there are so many hurdles for CCS to overcome, “one just has to put a big question mark on it,” the CRS cited a Department of Energy official as saying.
What about plug-in hybrid vehicles? When he was running for president, Obama pledged to put 1 million of the vehicles on the road by 2015. Aside from the question of how popular they’ll be with a projected retail price of $40,000 (as compared to $23,000 for a conventional vehicle), will they actually reduce carbon emissions? Only if the power plants they get electricity from produce little if any carbon. But since most U.S. electricity production is not carbon-free, the CRS observes that the “widespread adoption of plug-in hybrid vehicles through 2030 may have only a small effect on, and might actually increase, net CO2 emissions.”
The final carbon control options addressed by the CRS are the so-called “distributed energy resources” like rooftop solar panels, fuel cells, natural gas microturbines, small scale wind turbines, and combined heat and power systems (CHP), which makes productive use of “waste” heat from electricity generation. Of these resources, only CHP is economical, accounting for nearly 9 percent of U.S. electricity generating capacity in 2007. But according to the CRS, even CHP often faces technical and utility infrastructure barriers to implementation.
Combined with the dubious reasoning behind calls to reduce CO2 emissions -- check out this YouTube video produced by JunkScience.com -- and repeated avowals by China and India to not make any special efforts to reduce their CO2 emissions, the CRS report makes clear that significant U.S. carbon reduction could very well be little more than an expensive and painful exercise in futility.